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Goerres.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Guarantor"}},{"value":"The authors of this manuscript declare no relationships with any companies, whose products or services may be related to the subject matter of the article.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Conflict of interest"}},{"value":"One of the authors\u2014Zbigniew Lewandowski\u2014has significant statistical expertise.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Statistics and biometry"}},{"value":"Written informed consent was obtained from all subjects (patients) in this study.","order":5,"name":"Ethics","group":{"name":"EthicsHeading","label":"Informed consent"}},{"value":"Institutional Review Board approval was obtained.","order":6,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethical approval"}},{"value":"523 study subjects who received triamcinolone have been previously reported in a doctoral dissertation by Julia Simone\u00a0Landau at the University of Zurich (2010)\u2014\u201cShort term treatment success and predictive factors of minimally invasive lumbosacral injection therapy\u201d (The original title in German language \u2013\u201cKurzfristiger Behandlungserfolg und pr\u00e4diktive Faktoren der minimal-invasiven lumbosakralen Injektionstherapie\u201d) and in a poster based on this dissertation\u2014\u201cShort term follow-up in 837 patients undergoing lumbar spine infiltrations\u201d presented at Swiss Congress of Radiology 2010, without subsequent publication in a peer-reviewed journal. Gerhard W. Goerres was the scientific guarantor of this thesis. The main difference between our work and the aforementioned dissertation is that we set out to compare pain relief after lumbar ESI using particulate (triamcinolone) and non-particulate (dexamethasone) steroids, and to explore whether their relative effectiveness could differ for specific patient groups, and the thesis by doctor Landau investigated outcomes and predictive factors for the patients treated only with particulate steroids (triamcinolone).","order":7,"name":"Ethics","group":{"name":"EthicsHeading","label":"Study subjects or cohorts overlap"}},{"value":"\u2022 retrospective\u2022 observational\u2022 performed at one institution","order":8,"name":"Ethics","group":{"name":"EthicsHeading","label":"Methodology"}}]}}